Powertrain Control Module (PCM)

P0563-BATTERY VOLTAGE HIGH





For a complete wiring diagram, refer to the wiring information Electrical Diagrams.

- When Monitored:
With the ignition on. Engine RPM greater than 1000 RPM. With no other charging system codes set.

- Set Condition:
Battery voltage is 1 Volt greater than desired voltage for more than 10 seconds. Battery voltage greater than 15.75 Volts. One Trip Fault. Three good trips to turn off the Malfunction Indicator Lamp (MIL).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. DTC IS ACTIVE
1. Start the engine and allow it to reach operating temperature.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hand near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury.

2. Using a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Refer to the CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Checking for an Intermittent DTC.

2. CHECKING THE CHARGING SYSTEM OPERATION
1. Perform the diagnostic procedure for CHECKING THE CHARGING SYSTEM OPERATION. Checking the Charging System Operation.

Were any problems found?

Yes

- Repair as necessary.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.

No

- Refer to the CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Checking for an Intermittent DTC.